When comparing Loggly vs Sumo Logic, the Slant community recommends Loggly for most people. In the question“What are the best log aggregation & monitoring tools?”Loggly is ranked 6th while Sumo Logic is ranked 13th. The most important reason people chose Loggly is:

Pros

Pro

Automatically captures JavaScript errors

Pro

Hosted on a CDN already

Unlike Airbrake or LogEntries, you can download the library from GitHub and concatenate/minify it along with your other JS, or you can use it directly from Loggly's CDN.

Pro

Easy to set up

You only have to set up a HTTP JSON input and there are community examples to guide you.

Pro

Supports raw text, syslogs, and JSON

Raw text, syslogs, and JSON can be fed to Loggly.

Pro

Scalable

Sumo logic is entirely cloud based and very scalable.

Pro

Flexible licensing model

Licensing cost is primarily determined by daily ingest of logs, however this is averaged out over 30 days instead of locking a user out of their own data after an arbitrary number of license breaches.

Pro

Truly multi-tenant

Sumo Logic is truly multi-tenant, a single instance running on the server can serve multiple groups of users.

Pro

A large set of supporting Apps

Allows customers to quickly setup and start getting actionable insights from their infrastructure by using Apps that integrate with various different platforms out of the box.

Cons

Con

Difficult to setup

Setup is not easy, the whole process is disjointed, with open source libraries that regularly change and out of date installation instructions.

Con

Expensive

Loggly QUICKLY overflows the 200mb daily free allowance.

Con

The UI is confusing

The UI is very difficult to use, but it does offer a lot of features.

Con

Timestamps are in UTC in the UI, and can't be converted

Loggly shows all timestamps in UTC, and the bookmarklet that's supposed to convert them to local time doesn't work.

Con

JavaScript tracker has removed tag support

Con

Useless need for collectors

You have to install a plugin on each host to collect logs, the collector is 89MBs and is written in Java. there's no reason to install a Java tool to send syslog data when Linux already does that natively. The memory footprint for Java-based apps is way too high and, in this case, completely unnecessary.

Con

Difficult / Confusing Interface

The service and interface are very confusing.

Con

There can be issues with smaller vendors

There may be some issues when using devices and services for smaller vendors which are not officially supported by Sumo Logic.

Con

No free version

Con

Indexing and search are very slow

Sending around 45000 events to it may take more than 3 minutes to show up in the interface.Once they show up, a search may take up to 32 seconds to return results. On only 45000 events, the search should return in milliseconds.